Usher Syndrome: Introduction

Usher Syndrome:
Usher syndrome is an inherited condition that causes 1) a serious
hearing loss that is usually present at birth or shortly thereafter
... more about Usher Syndrome.

Usher Syndrome: A rare inherited disorder characterized by sensorineural deafness and progressive vision loss.
More detailed information about the symptoms,
causes, and treatments of Usher Syndrome is available below.

Article Excerpts about Usher Syndrome

Usher syndrome is an inherited condition that causes 1) a serious
hearing loss that is usually present at birth or shortly thereafter
and 2) progressive vision loss caused by retinitis pigmentosa (RP).
RP is a group of inherited diseases that cause night-blindness and
peripheral (side) vision loss through the progressive degeneration
of the retina, the light-sensitive tissue at the back of the eye
that is crucial for vision. (Source: excerpt from Usher Syndrome Resource Guide: NEI)

Usher Syndrome is listed as a "rare disease" by the Office of
Rare Diseases (ORD) of the National Institutes of Health
(NIH). This means that Usher Syndrome, or a subtype of Usher Syndrome,
affects less than 200,000 people in the US population.
Source - National Institutes of Health (NIH)

Ophanet, a consortium of European partners,
currently defines a condition rare when it affects 1 person per 2,000.
They list Usher Syndrome as a "rare disease".
Source - Orphanet

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